Five operators, including Southern and South Western have experienced industrial action over a move to make drivers operate doors.

The firms insist safety will not be compromised.

A spokeperson from South Western Trains said 'we want our railway to be as accessible as possible and we have a number of commitments within our franchise to help improve this. As well as continuing to work with accessibility groups on our network, we have appointed a dedicated Accessibility Manager to ensure customers, who require extra assistance, have a strong voice within our company'.